public State optimisticTraverse(State s0) {
// do not include minimum transfer time in heuristic weight
// (it is path-dependent)
StateEditor s1 = s0.edit(this);
s1.setBackMode(getMode());
return s1.makeState();
}
public State optimisticTraverse(State state0) {
int runningTime = getPattern().getBestRunningTime(stopIndex);
StateEditor s1 = state0.edit(this);
s1.incrementTimeInSeconds(runningTime);
s1.setBackMode(getMode());
s1.incrementWeight(runningTime);
return s1.makeState();
}
public State traverse(State s0) {
TripTimes tripTimes = s0.getTripTimes();
int runningTime = tripTimes.getRunningTime(stopIndex);
StateEditor s1 = s0.edit(this);
s1.incrementTimeInSeconds(runningTime);
if (s0.getOptions().isArriveBy()) s1.setZone(getStartStop().getZoneId());
else s1.setZone(getEndStop().getZoneId());
// s1.setRoute(pattern.getExemplar().getRoute().getId());
s1.incrementWeight(runningTime);
s1.setBackMode(getMode());
return s1.makeState();
}
public State traverse(State state0) {
RoutingContext rctx = state0.getContext();
RoutingRequest options = state0.getOptions();
Trip trip = pattern.getTrip();
if (options.isArriveBy()) {
/* reverse traversal, not so much to do */
// do not alight immediately when arrive-depart dwell has been eliminated
// this affects multi-itinerary searches
if (state0.getBackEdge() instanceof TransitBoardAlight
&& !((TransitBoardAlight) state0.getBackEdge()).isBoarding()) {
return null;
}
StateEditor s1 = state0.edit(this);
int type = pattern.getBoardType(stopIndex);
if (TransitUtils.handleBoardAlightType(s1, type)) {
return null;
}
s1.setTripId(null);
s1.setLastAlightedTime(state0.getTime());
s1.setBackMode(TraverseMode.BOARDING);
s1.setPreviousStop(fromv);
return s1.makeState();
} else {
/* forward traversal: look for a transit trip on this pattern */
if (!options.getModes().get(modeMask)) {
return null;
}
/* find next boarding time */
/*
* check lists of transit serviceIds running yesterday, today, and tomorrow (relative to
* initial state) if this pattern's serviceId is running look for the next boarding time
* choose the soonest boarding time among trips starting yesterday, today, or tomorrow
*/
long currentTime = state0.getTime();
int bestWait = -1;
TraverseMode mode = state0.getNonTransitMode();
if (options.bannedTrips.containsKey(trip.getId())) {
// see comment in FrequencyAlight for details
return null;
}
for (ServiceDay sd : rctx.serviceDays) {
int secondsSinceMidnight = sd.secondsSinceMidnight(currentTime);
// only check for service on days that are not in the future
// this avoids unnecessarily examining tomorrow's services
if (secondsSinceMidnight < 0) continue;
if (sd.serviceIdRunning(serviceId)) {
int startTime =
pattern.getNextDepartureTime(
stopIndex,
secondsSinceMidnight,
options.wheelchairAccessible,
mode == TraverseMode.BICYCLE,
true);
if (startTime >= 0) {
// a trip was found, wait will be non-negative
int wait = (int) (sd.time(startTime) - currentTime);
if (wait < 0) _log.error("negative wait time on board");
if (bestWait < 0 || wait < bestWait) {
// track the soonest departure over all relevant schedules
bestWait = wait;
}
}
}
}
if (bestWait < 0) {
return null;
}
/* check if trip is banned for this plan */
if (options.tripIsBanned(trip)) return null;
/* check if route is preferred for this plan */
long preferences_penalty = options.preferencesPenaltyForTrip(trip);
StateEditor s1 = state0.edit(this);
int type = pattern.getBoardType(stopIndex);
if (TransitUtils.handleBoardAlightType(s1, type)) {
return null;
}
s1.incrementTimeInSeconds(bestWait);
s1.incrementNumBoardings();
s1.setTripId(trip.getId());
s1.setZone(pattern.getZone(stopIndex));
s1.setRoute(trip.getRoute().getId());
s1.setBackMode(TraverseMode.BOARDING);
long wait_cost = bestWait;
if (state0.getNumBoardings() == 0) {
wait_cost *= options.waitAtBeginningFactor;
} else {
wait_cost *= options.waitReluctance;
}
s1.incrementWeight(preferences_penalty);
s1.incrementWeight(wait_cost + options.getBoardCost(mode));
return s1.makeState();
}
}
public State optimisticTraverse(State state0) {
StateEditor s1 = state0.edit(this);
// no cost (see patternalight)
s1.setBackMode(TraverseMode.BOARDING);
return s1.makeState();
}
@Override
public State traverse(State s0) {
RoutingRequest options = s0.getOptions();
// Ignore this edge if its stop is banned
if (!options.bannedStops.isEmpty()) {
if (options.bannedStops.matches(((TransitStop) fromv).getStop())) {
return null;
}
}
if (!options.bannedStopsHard.isEmpty()) {
if (options.bannedStopsHard.matches(((TransitStop) fromv).getStop())) {
return null;
}
}
if (options.arriveBy) {
/* Traverse backward: not much to do */
StateEditor s1 = s0.edit(this);
TransitStop fromVertex = (TransitStop) getFromVertex();
// apply board slack
s1.incrementTimeInSeconds(options.boardSlack);
s1.alightTransit();
s1.setBackMode(getMode());
return s1.makeState();
} else {
/* Traverse forward: apply stop(pair)-specific costs */
// Do not pre-board if transit modes are not selected.
// Return null here rather than in StreetTransitLink so that walk-only
// options can be used to find transit stops without boarding vehicles.
if (!options.modes.isTransit()) return null;
// If we've hit our transfer limit, don't go any further
if (s0.getNumBoardings() > options.maxTransfers) return null;
/* apply transfer rules */
/*
* look in the global transfer table for the rules from the previous stop to this stop.
*/
long t0 = s0.getTimeSeconds();
long slack;
if (s0.isEverBoarded()) {
slack = options.transferSlack - options.alightSlack;
} else {
slack = options.boardSlack;
}
long board_after = t0 + slack;
long transfer_penalty = 0;
// penalize transfers more heavily if requested by the user
if (s0.isEverBoarded()) {
// this is not the first boarding, therefore we must have "transferred" -- whether
// via a formal transfer or by walking.
transfer_penalty += options.transferPenalty;
}
StateEditor s1 = s0.edit(this);
s1.setTimeSeconds(board_after);
long wait_cost = board_after - t0;
s1.incrementWeight(wait_cost + transfer_penalty);
s1.setBackMode(getMode());
return s1.makeState();
}
}
/**
* return a StateEditor rather than a State so that we can make parking/mode switch modifications
* for kiss-and-ride.
*/
private StateEditor doTraverse(State s0, RoutingRequest options, TraverseMode traverseMode) {
boolean walkingBike = options.walkingBike;
boolean backWalkingBike = s0.isBackWalkingBike();
TraverseMode backMode = s0.getBackMode();
Edge backEdge = s0.getBackEdge();
if (backEdge != null) {
// No illegal U-turns.
// NOTE(flamholz): we check both directions because both edges get a chance to decide
// if they are the reverse of the other. Also, because it doesn't matter which direction
// we are searching in - these traversals are always disallowed (they are U-turns in one
// direction
// or the other).
// TODO profiling indicates that this is a hot spot.
if (this.isReverseOf(backEdge) || backEdge.isReverseOf(this)) {
return null;
}
}
// Ensure we are actually walking, when walking a bike
backWalkingBike &= TraverseMode.WALK.equals(backMode);
walkingBike &= TraverseMode.WALK.equals(traverseMode);
/* Check whether this street allows the current mode. If not and we are biking, attempt to walk the bike. */
if (!canTraverse(options, traverseMode)) {
if (traverseMode == TraverseMode.BICYCLE) {
return doTraverse(s0, options.bikeWalkingOptions, TraverseMode.WALK);
}
return null;
}
// Automobiles have variable speeds depending on the edge type
double speed = calculateSpeed(options, traverseMode, s0.getTimeInMillis());
double time = getDistance() / speed;
double weight;
// TODO(flamholz): factor out this bike, wheelchair and walking specific logic to somewhere
// central.
if (options.wheelchairAccessible) {
weight = getSlopeSpeedEffectiveLength() / speed;
} else if (traverseMode.equals(TraverseMode.BICYCLE)) {
time = getSlopeSpeedEffectiveLength() / speed;
switch (options.optimize) {
case SAFE:
weight = bicycleSafetyFactor * getDistance() / speed;
break;
case GREENWAYS:
weight = bicycleSafetyFactor * getDistance() / speed;
if (bicycleSafetyFactor <= GREENWAY_SAFETY_FACTOR) {
// greenways are treated as even safer than they really are
weight *= 0.66;
}
break;
case FLAT:
/* see notes in StreetVertex on speed overhead */
weight = getDistance() / speed + getSlopeWorkCostEffectiveLength();
break;
case QUICK:
weight = getSlopeSpeedEffectiveLength() / speed;
break;
case TRIANGLE:
double quick = getSlopeSpeedEffectiveLength();
double safety = bicycleSafetyFactor * getDistance();
// TODO This computation is not coherent with the one for FLAT
double slope = getSlopeWorkCostEffectiveLength();
weight =
quick * options.triangleTimeFactor
+ slope * options.triangleSlopeFactor
+ safety * options.triangleSafetyFactor;
weight /= speed;
break;
default:
weight = getDistance() / speed;
}
} else {
if (walkingBike) {
// take slopes into account when walking bikes
time = getSlopeSpeedEffectiveLength() / speed;
}
weight = time;
if (traverseMode.equals(TraverseMode.WALK)) {
// take slopes into account when walking
// FIXME: this causes steep stairs to be avoided. see #1297.
double costs = ElevationUtils.getWalkCostsForSlope(getDistance(), getMaxSlope());
// as the cost walkspeed is assumed to be for 4.8km/h (= 1.333 m/sec) we need to adjust
// for the walkspeed set by the user
double elevationUtilsSpeed = 4.0 / 3.0;
weight = costs * (elevationUtilsSpeed / speed);
time =
weight; // treat cost as time, as in the current model it actually is the same (this can
// be checked for maxSlope == 0)
/*
// debug code
if(weight > 100){
double timeflat = length / speed;
System.out.format("line length: %.1f m, slope: %.3f ---> slope costs: %.1f , weight: %.1f , time (flat): %.1f %n", length, elevationProfile.getMaxSlope(), costs, weight, timeflat);
}
*/
}
}
if (isStairs()) {
weight *= options.stairsReluctance;
} else {
// TODO: this is being applied even when biking or driving.
weight *= options.walkReluctance;
}
StateEditor s1 = s0.edit(this);
s1.setBackMode(traverseMode);
s1.setBackWalkingBike(walkingBike);
/* Handle no through traffic areas. */
if (this.isNoThruTraffic()) {
// Record transition into no-through-traffic area.
if (backEdge instanceof StreetEdge && !((StreetEdge) backEdge).isNoThruTraffic()) {
s1.setEnteredNoThroughTrafficArea();
}
// If we transitioned into a no-through-traffic area at some point, check if we are exiting
// it.
if (s1.hasEnteredNoThroughTrafficArea()) {
// Only Edges are marked as no-thru, but really we need to avoid creating dominant, pruned
// states
// on thru _Vertices_. This could certainly be improved somehow.
for (StreetEdge se : Iterables.filter(s1.getVertex().getOutgoing(), StreetEdge.class)) {
if (!se.isNoThruTraffic()) {
// This vertex has at least one through-traffic edge. We can't dominate it with a
// no-thru state.
return null;
}
}
}
}
/* Compute turn cost. */
StreetEdge backPSE;
if (backEdge != null && backEdge instanceof StreetEdge) {
backPSE = (StreetEdge) backEdge;
RoutingRequest backOptions =
backWalkingBike ? s0.getOptions().bikeWalkingOptions : s0.getOptions();
double backSpeed = backPSE.calculateSpeed(backOptions, backMode, s0.getTimeInMillis());
final double realTurnCost; // Units are seconds.
// Apply turn restrictions
if (options.arriveBy && !canTurnOnto(backPSE, s0, backMode)) {
return null;
} else if (!options.arriveBy && !backPSE.canTurnOnto(this, s0, traverseMode)) {
return null;
}
/*
* This is a subtle piece of code. Turn costs are evaluated differently during
* forward and reverse traversal. During forward traversal of an edge, the turn
* *into* that edge is used, while during reverse traversal, the turn *out of*
* the edge is used.
*
* However, over a set of edges, the turn costs must add up the same (for
* general correctness and specifically for reverse optimization). This means
* that during reverse traversal, we must also use the speed for the mode of
* the backEdge, rather than of the current edge.
*/
if (options.arriveBy && tov instanceof IntersectionVertex) { // arrive-by search
IntersectionVertex traversedVertex = ((IntersectionVertex) tov);
realTurnCost =
backOptions
.getIntersectionTraversalCostModel()
.computeTraversalCost(
traversedVertex,
this,
backPSE,
backMode,
backOptions,
(float) speed,
(float) backSpeed);
} else if (!options.arriveBy && fromv instanceof IntersectionVertex) { // depart-after search
IntersectionVertex traversedVertex = ((IntersectionVertex) fromv);
realTurnCost =
options
.getIntersectionTraversalCostModel()
.computeTraversalCost(
traversedVertex,
backPSE,
this,
traverseMode,
options,
(float) backSpeed,
(float) speed);
} else {
// In case this is a temporary edge not connected to an IntersectionVertex
LOG.debug("Not computing turn cost for edge {}", this);
realTurnCost = 0;
}
if (!traverseMode.isDriving()) {
s1.incrementWalkDistance(realTurnCost / 100); // just a tie-breaker
}
long turnTime = (long) Math.ceil(realTurnCost);
time += turnTime;
weight += options.turnReluctance * realTurnCost;
}
if (walkingBike || TraverseMode.BICYCLE.equals(traverseMode)) {
if (!(backWalkingBike || TraverseMode.BICYCLE.equals(backMode))) {
s1.incrementTimeInSeconds(options.bikeSwitchTime);
s1.incrementWeight(options.bikeSwitchCost);
}
}
if (!traverseMode.isDriving()) {
s1.incrementWalkDistance(getDistance());
}
/* On the pre-kiss/pre-park leg, limit both walking and driving, either soft or hard. */
int roundedTime = (int) Math.ceil(time);
if (options.kissAndRide || options.parkAndRide) {
if (options.arriveBy) {
if (!s0.isCarParked()) s1.incrementPreTransitTime(roundedTime);
} else {
if (!s0.isEverBoarded()) s1.incrementPreTransitTime(roundedTime);
}
if (s1.isMaxPreTransitTimeExceeded(options)) {
if (options.softPreTransitLimiting) {
weight +=
calculateOverageWeight(
s0.getPreTransitTime(),
s1.getPreTransitTime(),
options.maxPreTransitTime,
options.preTransitPenalty,
options.preTransitOverageRate);
} else return null;
}
}
/* Apply a strategy for avoiding walking too far, either soft (weight increases) or hard limiting (pruning). */
if (s1.weHaveWalkedTooFar(options)) {
// if we're using a soft walk-limit
if (options.softWalkLimiting) {
// just slap a penalty for the overage onto s1
weight +=
calculateOverageWeight(
s0.getWalkDistance(),
s1.getWalkDistance(),
options.getMaxWalkDistance(),
options.softWalkPenalty,
options.softWalkOverageRate);
} else {
// else, it's a hard limit; bail
LOG.debug("Too much walking. Bailing.");
return null;
}
}
s1.incrementTimeInSeconds(roundedTime);
s1.incrementWeight(weight);
return s1;
}
